Overlapped-end box



Jan. 2, 1951 s. BERGSTEIN OVERLAPPED END BOX 2 Sheets-Sheet 1 Filed D90. 7, 1944 INVENTOR. SEMI/EL Berass'reuv,

ATTORNEYS.

Jan. 2, 1951 s. BERGSTEIN 5 5 OVJEIRLAPI-ED END BOX Filed Dec. 7, 1944 2 Sheets-Sheet 2 INVENTOR. SAMUEL. BERGSTEIN,

RTTO RN EYSV.

Patented Jan. 2, 1951 OVERLAPPED-END BOX Samuel Bergstein, Cincinnati, Ohio, assignor to Robert Morris Bergstein and Frank David Bergstein, trustees Application December 7, 1946, Serial No. 714,749

10 Claims. (Cl. 229-31) My invention relates to paperboard boxes which are erectable by the user from blanks or folded and glued collapsed structures, and which involve flaps on certain walls which are foldable inwardly, when the boxes are set up, so as to cover and retain mean whereby the box walls are held in the erected condition. Such boxes are frequently called overlapped-end" boxes.

The principal object of the invention is the provision of improvements in the structure and manufacture of such boxes, whereby, without any significant cost differences, they may be made firmer and more secure, as well as capable of being set up with greater ease.

More specifically it is an object of the invention to provide a positive locking means for the inturned flap.

These and other objects of the invention which will be set forth hereinafter or will be apparent to one skilled in the art upon reading these specifications, I accomplish in that structure and arrangement of parts and by that procedure of which I shall now describe exemplary embodiments. Reference is made to the accompanying drawings wherein:

Figure 1 is a plan view of a blank for an exemplary box element,

Figure 2 is a plan view of the blank folded and glued, and in the collapsed condition in which it is sent to the box user.

Figure 3 is a plan view of the structure, illustrative of a step preliminary to the setting up of the box element.

Figures 4 and 5 are partial perspective views showing successive operations in setting up the box element.

Figure 6 is a perspective view of the erected box element.

Figure 7 is a plan view of the blank for a modified box element.

Figure 8 is a plan view showing a first stage of folding and gluing.

Figure 9 is a plan view showing of folding and gluing.

Figure 10 is a perspective view showing the folded and glued, collapsed box element, in the condition in which it is sent to the box user.

Figure 11 is a partial perspective view showa second stage ing an intermediate stage of erection.

Figure 12 is a partial perspective view showing an end of the erected box element.

Referring to Figure 1, I have shown a cutand scored paperboard blank in which the scores are indicated by dot dash lines and in which lines for severance are indicated by dash lines.

The blank presents a main panel I, side walls 2 and 3, and end walls 4 and 5 articulated to the main panel. Between the ends of the side and end walls I have shown bellows folding corner webs 6, l, 8 and 9. These are diagonally scored as shown.

The end walls 4 and 5 carry flaps ill and II respectively which in the erected structure will be turned inwardly over the bellows folded portions. The flaps i0 and II also carry articulated extensions 12 and 13.

In the formation of the blank I leave relatively narrow strips of board l4, l5, l6 and ll, articulated respectively to the ends of the extensions l2 and i3. This may be done without wastage since it is not usually possible to telescope on a sheet of boxboard a series of blanks having the other features shown in Figure 1.

The lines of articulation of the strips l4, I, I6 and I1 to the respective extensions i2 and 13 are lines for severance made by weakening the board in any suitable way. They are normally made by the use of perforating rules in the cutting and scoring press. The lines of articulation of the extensions l2 and ii to the respective flaps Ill and II may also be advantageously made as lines for severance. These will be so placed preferably that the depth of flaps l0 and II will be equivalent to the depth of end walls 4 and 5. The edges of the strips l4, I5, is and H which lie toward the main portion of the blank are spaced outwardly from the last mentioned lines for severance for a purpose which wlll be described.

The blank of Figure 1 is intended to be folded and glued before being sent to the box user. This may be accomplished in an ordinary carton folding and gluing machine; and it is my practice to equip such a machine with an adhesive applicator which will apply areas l8, i9, 20 and 2| of adhesive to appropriate portions of the side walls 2 and 3. Then the carton blank is folded on the lines of articulation between the end walls and their respective flaps, giving the structure shown in Figure 2. This structure is characterized by an adhesive attachment of the strips H, IS, IS and il, to the ends of the side walls 2 and 3, and by no other adhesive attachment. The spacing of the edges of these strips set forth above is to bring them, as shown, inwardly of the some lines by which the bellows folding webs 6, I, 8 and 9 are articulated to the ends of the side walls. Figure 2 shows the condition in which the blank is shipped to the user.

the box, will fold outwardly the flaps i6 and ing structure provided by me does not require a turn-over at the bottom edge of the inturned flap.

In setting up the box element the side and end walls are raised with respect to the main panel, and the bellows folding portions are folded on their diagonal score lines as will be clear from Figures 4 and 5. The bellows folded portions are disposed interiorly of the erected endwalls, and thereupon the flaps i and ii are .folded inwardly over the bellows folding portions to conceal and retain them.

The edges of the extensions l0 and Ii, when depressed, engage behind the strips I4, l5, l6 and II, as will be clear from Figure 6. These strips act as looking abutments, securely retaining the flaps l0 and I I in position, with or without the extensions l2 and ii. I have thus provided a box of the overlapped end style having a neat and positive lock for the inturned flap, and have accomplished this by a structure and by operations of inexpensive character.

' Referring to Figure 7. I have shown a structure in which again there is a main panel 22, side walls 23 and 24, and end walls 25 and 26, with flaps 21 and 28. and flap extensions 29 and I4. Bellows'folding corner webs are shown at II, 32,- 23, and 34. In this instance instead of continuing the diagonal score lines throughout the corner webs, I have slotted these webs as shown at 25, 36, 21 and 38, and have carried the diagonal score lines to the ends of the slots. Corner web fiaps articulated to the respective corner webs are shown at 39, 40, 4'! and 42. These flaps have extensions 43, 44, 45 and 46, articulated to the flaps by lines for severance. The lines of by turning inwardly the corner web flaps 39,40,

4| and 42, and their extensions 43, 44, 45 and 46.

The depth of the corner web flaps is somewhat this results as before. in the spacing of the extensions 42, 44', 45 and 46 slightly inwardly from the score lines by which the corner webs are articulated to the side walls.

Having by these operations brought the blank to the condition shown in Figure 8, I next apply areas of adhesive 5|, 52, 53, and 54 to the inturned corner web flaps 39, 40, 4| and 42. Next I fold inwardly the side walls 23, and 24, together with their articulated corner webs, giving a construction like that shown in Figure 9. This is a structure for a fully automatic box element, in which the end walls 25 and 26 will be erected by the act of raising the side walls 23 and 24 as shown in Figure 11. Since the corner web flaps are adhered to the end walls 25 and 26, this raising of the side walls results in the severance of portions 43, 4'4, 45 and 4B fromthe corner web flaps, as will also be clear from Figure 11. These portions can now act as looking strips in the manner hereinabove described. During the erection of the greater than the depth of the corner webs, and v 4 side and end walls, the corner webs fold on their diagonal score lines as shown in Figure 11.

When theside and end walls have been fully erected, the end wall flaps 21 and 28 are folded inwardly over the corner webs and corner web flaps. ,The edges of the end wall flaps 21 and 28 are pressed behind strips 43, 44, 45 and 46 and thus become locked. The end wall flap extensions 29 and 30 may be left in place as shown, or they may be detached. It is also possible to omit them in the initial formation of the blank. It will be noted that there is a slot between the end wall flaps and the corner web flaps in the blank of Figure 7. This slot results in a spacing of the ends of the strip members 43, 44, 45, and 46 from the lines of articulation of the side walls 23 and 24 to the main panel 22. This spacing will accommodate the ends of the extensions 29 and 30 where these are left in place.

The erecting operations described in connection with both of the above modifications may be performed by hand. While I have shown box elements involving bellows folding corner portions (which I prefer for security and strength), it will be understood that features of my invention as hereinafter claimed, are applicable to styles of boxes having flaps on the ends of the sidewalls, which flaps are not articulated to the end walls but occupy the same position as the corner webs in the illustrated structures.

Modifications may be made in my invention without departing from the spirit of it.

Having thus described my invention in certain exemplary embodiments, what I claim as new and desire to secure by Letters Patent is:

l. A box having a main panel and side and end walls articulated thereto, means articulated to the ends of the side walls to be turned insidethe end walls, and extensions on the end walls to be turned inwardly over the, last mentioned means to maintain the box in erected condition, and abutment strips secured to the side walls at the ends of the side walls behind which, in the erected structure, the side edges ofthe said'end wall extensions may be engaged.

2. A box having a main panel and side and end walls articulated thereto, means articulated to the ends of the side walls to be turned inside the end walls, and extensions on the end walls to be turned inwardly over the last mentioned means to maintain the box in erected condition, and abutment strips at the ends of the side walls behind which, in the erected structure, the side edges of the said end wall extensions may be engaged, said strips originally existing in the box as severable side extensions of a member articulated to said end wall extensions, the box in knocked down form having said end wall extensions and the parts articulated thereto in infolded condition, with said strips adhered to said side walls.

'3. A box having a main panel and side and end walls a ticulated thereto, means articulated to the endsf the side walls to be turned inside the end walls, and extensions on the end walls to be turned inwardly over the last mentioned means to maintain the box in erected condition, and abutment strips at the ends of the side walls behind which, in the erected structure, the side edges of the said end wall extensions may be en- 7 gaged, said strips originally existing in the box behind which, in the erected structure, the side edges of the said end wall extensions may be engaged, said strips originally existing in the box as extensions on flaps articulated to the said mem-' bers on the ends of the side walls, the box in knocked down condition having said extensions and strips in infolded condition with said strips adhered to the side walls, the said members articulated to the side walls being bellows-folding webs also articulated to the end walls, and the box in knocked down condition having its side walls and the parts articulated thereto also in infolded condition with the said extensions on the webs adhered to end portions of thesaid end walls.

5. In a paperboard box, a main panel, side and end walls articulated thereto, bellows folding webs connecting the ends of the side and end walls, flaps on the end walls, extensions on said flaps and sidewise disposed strip-like members on said extensions, the box in knockeddown condition having its flaps in infolded condition with said sidewise extensions adhered to end portions of the side walls, the proportioning of the parts being such that said sidewise extensions lie inwardly of the lines of articulation between the ends of the side walls and said bellows folding corner webs.

6. A paperboard box having a main panel and side and end Walls in articulation, bellows-folding corner webs connecting the ends of the side and end walls, inturnable flaps on the end walls,

flaps on the said webs extending in the direction flaps on the said webs extending in the direction of the length of the side walls, severable extensions on said flaps, said flaps having a depth slightly greater than the depth of said webs whereby when said flaps are infolded, said severable extensions may be adhered to end portions of the side walls spaced from the lines of articulation between the said side walls and said bellows-folding webs, said box in collapsed condition having its flaps so folded and extensions so secured, and having its side walls, webs, web-flaps and extensions infolded with said web-flaps adhesively secured to end portions of said end walls.

8. In a knocked-down paperboard box, a main panel and side and end walls in articulation, foldable extensions on the ends of said side walls, said extensions comprising inner portions of outer portions, said inner portions lying adjacent the ends of the side walls of the box, said outer portions lying beyond the ends of said box, severable extensions on said outer portions, said outer portions having a depth slightly greater than the depth of said inner portions and in- V folded to overlie said inner portions, with said severable extensions secured to end portions of the said side walls in areas spaced from the lines of articulation between the said side walls and said foldable extensions.

9. In a knocked-down paperboard box, a. main panel and side and end walls in articulation, bellows-folding corner webs connecting the ends of the side and end walls, inturnable flaps on the end walls, web flaps on the said corner webs extending in the direction of thelength of said side walls, severable extensions on said web flaps, said web flaps having a depth slightly greater than the depth of said corner webs and infolded to overlie said corner webs with said severable extensions secured to end portions of the said side walls in areas spaced from the lines of articulation between the said side walls and the said corner webs, the said side walls, corner webs and Web flaps infolded, with said web flaps adhesively secured to end portions of said end walls.

10. In the process of making paperboard boxes having a main panel and side and end walls in articulation, bellows-folding corner webs connecting the ends of the side and end walls, inturnable flaps on the end walls, web flaps on the said corner webs extending in the direction of the length of said side walls, and severable extensions on the said web flaps, the steps of infolding said web flaps to overlie said corner webs and adhering said severable extensions to end portions of said side walls, and then infolding said side walls, corner Webs and web flaps and adhering said web flaps to end portions of said end walls.

SAMUEL BERGSTEIN.

" REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

